Use lead round nose or full metal jacket ammo. For maximum target life, use any caliber .22s thru .45s

Optimal bullet velocity ranges from 750 fps to 1,250 fps

Newbold’s Auto-Reset L-Series Heart Target mounts on soft wood 2X4s, 2X3s and 1X6s. With each hit the L-Series Heart Target snaps back and then auto-resets to the upright position. There is no need to go down-range to reset this target. The one-piece L-Series Heart target has a flexible hinge at the base made of ElastiMAX™, the same polymer material as the target, so bullets pass thru the target and the hinge. For an entirely different reaction, remove the bolts to knock the L-Series Heart Target completely off the stand.